矽球太陽能電池之反射板系統設計與分析

Abstract

目前太陽電池發展的瓶頸一項為效率，另一項為價格，在光電轉換的過程中，事實上，並非所有的入射光譜都能被太陽電池所吸收，並完全轉成電流，所以單一電池的最高效率約在25%左右。本篇論文中主要係針對反射板結合太陽能電池，提出增進其電功率輸出的方式。 設計矽球太陽能電池的反射板系統不但增加了矽球本身的受光區域，同時可以提高矽球太陽能電池的輸出電功率。在本文中設計出較佳的反射板幾何外型(Type B與Type C)並利用數學計算入射光線至矽球的形狀因子及受光面積。兩款新型的反射板系統(Type B與Type C)係利用太陽光入射至反射板上，藉由反射作用將太陽光線照射到矽球底部的陰影區，造成受光區增加，當光入射為900時受光面積可以接近100%。

The two major bottlenecks of developing solar cell are cost effective and solar cell efficiency. Not all incident light of spectrum is absorbed by solar cell and transformed to current completely in the fact. The maximum efficiency of the single solar cell is about 25% which is almost achieved to the theoretical value. The thesis mainly studies on spherical solar cell combining with reflector and mentions the way that can increase the power of electricity output. It not only increases the region of incident light, but also increases the power of electricity output at the same time if designing the reflector system of spherical solar cell has be done. Design the better reflector (Type B and Type C) geometrically, calculate the Shape Factor of incident light to the Si spherical and the area of incident light with mathematics in the thesis. The two new types (Type B and Type C) of the reflector system are increased the region of incident light by using the incident light which reflects it to the bottom of the spherical. The incident light of region can be reached approximating 100% as the incident light is 90°.